It's true, my old Thunderbolt would lose ~10%/hour in standby (screen off, no user interaction) if mobile data (4G LTE) was on. While screenshots of battery life may be misleading because we know little of the conditions surrounding the device (network connection status, apps used, amount of data transferred, screen time, etc), I feel they can be least semi-relevant in posts like this. The degree of relevance obviously increases if the person posting the screenshot gives as much info about the scenario in which that performance was achieved, however.
Disabling GTalk or *any* unused services will obviously help get you as much extra juice as possible, but for each user it's going to be different. I actually use GTalk quite a bit, so for me leaving it on is necessary. I prefer to leave maps on too. Just a matter of balancing which services you want vs. the battery efficiency you want to achieve. Maps can be a battery hog, especially if you use Google Now and are in a low-signal area with poor data signal, however I've never really found Google Talk to make that much of a difference.
1. Remove Juice Defender
2. Are you able to pinpoint which apps are frequently using data? What kind of network are you using (wifi, mobile)? What kind of signal strength do you have?
When I'm at home on wifi, my battery lasts incredibly long -- I've gone close to 48 hours on a single charge. At work in my office, however, with horrible signal and wifi to connect to, my phone is often near dead by lunch time even if I start the day on a full charge.
Under normal conditions, screen time is probably gonna be the biggest consumer of power, however if your data signal is low, and you've apps trying to access data, that will eat your battery VERY quickly.